How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE?

(1) 4

(2) 8

(3) 16

(4) 32

Subtopic:  Dihybrid Cross: Details |
 73%
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Two heterozygous round yellow seeded pea plants are intercrossed. In the progeny, the trait for seed shape will segregate in the ratio:

(1) 1 : 1

(2) 3 : 1

(3) 1 : 1 : 1 : 1

(4) 9 : 3 : 3 : 1

Subtopic:  Dihybrid Cross: Details |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Given the parents AABBCc × AabbCc, assume simple dominance and independent assortment. What proportion of the progeny will be expected to phenotypically resemble the first parent?

(1) 1/4

(2) 1/8

(3) 3/4

(4) 3/8

Subtopic:  Dihybrid Cross: Details |
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In a cross between AABB X aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb and aabb would be:

(1) 9 : 3 : 3 : 1

(2) 2 : 1 : 1 : 2

(3) 1 : 2 : 2 : 1

(4) 7 : 5 : 3 : 1

Subtopic:  Dihybrid Cross: Details |
 52%
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Which of the following terms best describes when the phenotype of the heterozygote differs from the phenotypes of both homozygotes?

(1) Incomplete dominance

(2) Multiple alleles

(3) Codominance

(4) Epistasis

Subtopic:  Dominance Deviation from Mendel: 1 |
 76%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

A man of blood group A marries a woman of AB blood group. Which type of progeny would indicate that man is heterozygous A?

(1) AB

(2) A

(3) O

(4) B

Subtopic:  Dominance Deviation from Mendel: 2 |
 54%
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The gene for eye color in a certain organism has seven alleles. How many genotypic combinations are possible?

(1) 2

(2) 14

(3) 28

(4) 56

Subtopic:  Chromosomal Basis of Inheritance: Introduction |
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In chickens, gene R produces a rose-shaped comb, gene r produces a single comb, gene P produces pea-shaped comb and gene p produces a single comb. When P and R are both present in the genotype, the comb is walnut shaped. Two chickens with genotype RrPp are intercrossed. What will be the ratio of Walnut shaped, Rose shaped, Pea shaped and single comb progeny respectively:

(1) 3 : 1 : 1 : 3

(2) 1 : 1: 1 : 1

(3) 9 : 3 : 3 : 1

(4) 12 : 3 : 4

Subtopic:  Polygenic Inheritance & Pleiotropy |
 66%
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Two pure lines of corn have mean cob lengths of 9 and 3 inches respectively. The polygenes involved in this trait all exhibit additive gene action. Crossing these two lines is expected to produce a progeny with mean cob length [in inches] of:

(1) 12.0

(2) 7.5

(3) 6.0

(4) 2.75

Subtopic:  Polygenic Inheritance & Pleiotropy |
 58%
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Diseases that are caused by the malfunction of a pleiotropic gene are:

(1) cured by dietary restrictions

(2) reversible by gene therapy

(3) called as syndromes

(4) extremely rare

Subtopic:  Polygenic Inheritance & Pleiotropy |
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